I ve done the bull barrel thing also, looks cool but I don't think it's worth the real world hassle it brings.
I had a heavy barrel 223, shot very well, super accurate but the carry around the hills was a prick and it had to be sot off a bipod as free hand shooting was a workout.
Sold it and ended up with another 223 but just a standard barrel..... shot just as well and was a much easier rifle to hunt with.
I shoot a 17HMR a lot ( living in central ,rabbits everywhere ) if the 223 could handle the rate of fire and heat in a standard barrel a HMR isn't going to suffer problems.
A heavy barrel won't in my experience make a rifle a better shooter in the field.
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